condition mean min max ZT0-3 10.23457 9.397639999999999 11.0715 ZT4-7 8.964175000000001 8.964175000000001 8.964175000000001 ZT8-11 9.42032 9.42032 9.42032 ZT12-15 0 0 0 ZT16-19 11.060400000000001 11.060400000000001 11.060400000000001 ZT20-23 11.7548 11.7548 11.7548